Students will exlpore the process of sublimation through a demonstration that will be orchestrated in class.
Objectives
Students will make a predictions on wether all substances can sublime.
Students will infer from the demonstration that CO2 is undergoing sublimation.
Students will make quality observations that use scientific terms and factual recall from prior knowledge.
Students will observe that the phase changes of sublimation and deposition do not experience a liquid phase.
No student is to touch the dry ice in un-gloved hands
Instruction
I will place dry ice on the desk top for students to observe sublimation of the solid when exposed to room temperature.
I then will fill the pyrex bowl with water and bubble solution and drop a large chunk of dry ice into it. This creates an overwhelming about of bubbles that are all filled with CO2 gas.
The next demonstration involves me wetting the towel with dish liquid and water and running it over the top of the bowl to create a bubble seal. This creates one large bubble of CO2 gas.
Opening
Students answer a daily question which asks "Can all substances sublime and deposit? Why or why not? Explain in 2-3 sentences."
We disscuss this in class before we conduct the demo.
Learning Activities
Students make predictions when they answer the daily question. They are then provided the opportunity to challenge their prediction by observing the demonstration of sublimation in class.
Students then engage in a class discussion about the kinetic energy and particle movement that occurs in sublimation and deposition. They will pull information from their prior knowlege of the definitions of thes wor. They will also refine their understanding of these words by applying examples from the demonstration that we conducted in class.
Closing
Students create an exit slip and write about two thing that they learned throughout the class
Assessment
The completion of their Freyer square. This requires students to infer what is occuring at the particle level of a substance as it undergoes sublimation and deposition.
Homework
Additional Notes
Have students create a lab report to accompany this demonstration. The daily question will be a focus question that is followed by a hypothesis. Students will record the materials and observations that they witness throughout the demo. Students will then have the opportunity the prove or disprove their origional prediction using evidence from their observations.
Unit: Phases of Matter
Title: Sublimation and Deposition
Lesson Overview
Students will exlpore the process of sublimation through a demonstration that will be orchestrated in class.Objectives
Students will make a predictions on wether all substances can sublime.Students will infer from the demonstration that CO2 is undergoing sublimation.
Students will make quality observations that use scientific terms and factual recall from prior knowledge.
Students will observe that the phase changes of sublimation and deposition do not experience a liquid phase.
Materials
Links to Resources
http://bit.ly/xHivyQSafety Issues
No student is to touch the dry ice in un-gloved handsInstruction
I will place dry ice on the desk top for students to observe sublimation of the solid when exposed to room temperature.I then will fill the pyrex bowl with water and bubble solution and drop a large chunk of dry ice into it. This creates an overwhelming about of bubbles that are all filled with CO2 gas.
The next demonstration involves me wetting the towel with dish liquid and water and running it over the top of the bowl to create a bubble seal. This creates one large bubble of CO2 gas.
Opening
Students answer a daily question which asks "Can all substances sublime and deposit? Why or why not? Explain in 2-3 sentences."We disscuss this in class before we conduct the demo.
Learning Activities
Students make predictions when they answer the daily question. They are then provided the opportunity to challenge their prediction by observing the demonstration of sublimation in class.Students then engage in a class discussion about the kinetic energy and particle movement that occurs in sublimation and deposition. They will pull information from their prior knowlege of the definitions of thes wor. They will also refine their understanding of these words by applying examples from the demonstration that we conducted in class.
Closing
Students create an exit slip and write about two thing that they learned throughout the classAssessment
The completion of their Freyer square. This requires students to infer what is occuring at the particle level of a substance as it undergoes sublimation and deposition.Homework
Additional Notes
Have students create a lab report to accompany this demonstration. The daily question will be a focus question that is followed by a hypothesis. Students will record the materials and observations that they witness throughout the demo. Students will then have the opportunity the prove or disprove their origional prediction using evidence from their observations.